According to an interview with Khary Payton, AMC originally planned on having Shiva, King Ezekial's pet tiger, have the ability to talk. This idea was ultimately scrapped as it was seen as "too silly."
Henry, the younger brother of Ben (the boy Morgan trains to fight), is played by Macsen Lintz, the younger brother of Madison Lintz, who played Carol's (Melissa McBride) daughter Sophia in seasons 1 and 2.
Shiva the tiger is the first CGI character on The Walking Dead (2010) series. Using a combination of CGI and animatronics.
The song being sung by the Kingdom Choir in The Well is titled "Don't Think Twice, It's Alright" by Bob Dylan and was written in 1962 and released on the 1963 album "The Freewheelin' Bob Dylan" and as a single.
Alanna Masterson, Josh McDermitt and Christian Serratos were all updated to Opening Credit status this episode. Also Steven Yeun and Michael Cudlitz are removed from the opening credits.